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440C (UNS designation S44004) is a martensitic 400 series stainless steel, [1] and has the highest carbon content of the 400 stainless steel series. It can be heat treated to reach hardness of 58 to 60 HRC. It can be used to make rolling contact stainless bearings, e.g. ball bearings and roller bearings. It is also used to make knife blades.
SAE Type 630 stainless steel (more commonly known as 17-4 PH, or simply 17-4; also known as UNS S17400) is a grade of martensitic precipitation hardened stainless steel. It contains approximately 15–17.5% chromium and 3–5% nickel, as well as 3–5% copper. [1] The name comes from the chemical makeup which is approximately 17% chromium and 4 ...
CPM S30V is a martensitic (hardened) powder-made (sintered) wear and corrosion-resistant stainless steel developed by Dick Barber of Crucible Industries in collaboration with knifemaker Chris Reeve. [ 1 ] [ 2 ] Its chemistry promotes the formation and even distribution of vanadium carbides , which are harder and more resistant to abrasion than ...
Stainless steel, also known as inox, corrosion-resistant steel (CRES), and rustless steel, is an iron-based alloy containing a minimum level of chromium that is resistant to rusting and corrosion. Stainless steel's resistance to corrosion results from the 10.5%, or more, chromium content which forms a passive film that can protect the material ...
The light-straw color is very hard, brittle steel, but the light-blue is softer and very springy. Beyond the blue color, when the steel turns grey, it is more likely to be very malleable, which is usually undesirable in a chisel. If the steel is too soft it can bend or mushroom, plastically deforming under the force of the hammer. [21]
As a simple electrolyte, it is possible to use a 3% solution of trisodium phosphate, a cathode of stainless steel, object as anode. The color depends on voltage. Many other electrolytes can be used—even Coca-Cola. Straw yellow / 10V – violet / 29 V – blue / 30 V – blue green 45 V – light green / 55 V – purple-red / 75 V – grey ...
The Leidenfrost effect only works when the surface of the pan is higher than water's boiling point, so you want to turn your stove to medium heat and allow the stainless steel to get hot.
Steel, stainless steels, hard cast irons, pearlitic malleable iron, titanium, titanium alloys, deep case-hardened steel, other materials harder than 100 HRB: 100: 500 D: HRD: 100: spheroconical diamond † Thin steel and medium case-hardened steel and pearlitic malleable iron: 100: 500 E: HRE: 100: 1 ⁄ 8 in (3.18 mm) ball